Question

Por favor é urgente!!!!

Answer 1

Resposta:

Explicação passo-a-passo:

É bem simples :)

Para resolver precisamos lembrar do artificio chamado "racionalizar" o denominador, então:

$a)\\\\\frac{4}{\sqrt{3}}\\\\\frac{4}{\sqrt{3}}.\frac{\sqrt{3}}{\sqrt{3}}\\\\\frac{4\sqrt{3}}{\sqrt{3}^2}\\\\\frac{4\sqrt{3}}{3}\\\\b)\\\\\frac{\sqrt{5}}{\sqrt{7}}\\\\\frac{\sqrt{5}}{\sqrt{7}}.\frac{\sqrt{7}}{\sqrt{7}}\\\\\frac{\sqrt{5}\sqrt{7}}{\sqrt{7^2}}\\\\\frac{\sqrt{5}\sqrt{7}}{7}\\\\c)\\\\\frac{9}{4\sqrt{3}}\\\\\frac{9}{4\sqrt{3}}.\frac{4\sqrt{3}}{4\sqrt{3}}\\\\\frac{9.4\sqrt{3}}{4^2\sqrt{3^2}}\\\\\frac{36\sqrt{3}}{16.3}\\\\\frac{36\sqrt{3}}{48}$

$d)\\\\\frac{11\sqrt{7}}{4\sqrt{6}}\\\\\frac{11\sqrt{7}}{4\sqrt{6}}.\frac{4\sqrt{6}}{4\sqrt{6}}\\\\\frac{11.4.\sqrt{7}.\sqrt{6}}{4^2\sqrt{6^2}}\\\\\frac{44\sqrt{42}}{16.6}}\\\\\frac{44\sqrt{42}}{96}$

Lembrete: confira os resultados!!

Espero que te ajude :)